Give a Relational Model that corresponds to the Entity-Relationship Diagram in Figure 1. You must present this model as a Relational Database Schema and not as a diagram. Primary and foreign keys must be declared where required. Please keep the names of attributes and role names where required and do not re- place them with different names. Provide NOT NULL constraints only where semantically justified by the Entity-Relationship diagram.

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Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.